Although it has nothing to do with the list, I consider this fact very interesting: Leonardo da Vinci invented the sniper firearm.It was not a rifle, as its barrel was smoothbore, but he greatly improved its accuracy by bolting one of his refracting telescopes onto it, aligning it precisely, and used it, in the company of his employer, the Duke of Milan, to shoot enemy soldiers off castle walls from 1,000 yards.He claims the equivalent of 1,000 yards in his notes, but I doubt the distance was th